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Nassau County, NY Parcels & GIS Data

Nassau County, NY parcel data: 407,566 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Nassau County, New York parcel data covering 407,566 property records.

This page documents parcel-level coverage for Nassau County, New York. Each parcel record carries its boundary polygon (GIS geometry) along with attributes such as the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and most recent sale price and date. Exact fill rates for Nassau County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Nassau County property dataset.

Nassau County is a densely populated and affluent suburban county located on Long Island, immediately to the east of New York City, bordering the Long Island Sound on the north and the open Atlantic Ocean to the south. As of the 2020 United States census, Nassau County's population was 1,395,774, making it the sixth-most populous county in the State of New York and 29th in the nation, reflecting an increase of 56,242 (+4.2%) from the 1,339,532 residents enumerated at the 2010 census. By 2025, Nassau's population was approaching 1.4 million, driven by a high influx of Asians. The county seat is Mineola, while Nassau County's largest and most populous town is Hempstead.

FIPS 36059

Official county website: http://www.nassaucountyny.gov

The FIPS code for Nassau County is 36059.

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Attribute coverage

Nassau County contains 407,566 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%407,566
parcelid100%407,566
parcelid2100%407,541
ogparcelid100%407,566
ogparcelid2100%407,541
parentid<0.1%0
stackid<0.1%0
geoid100%407,566
statefp100%407,566
countyfp100%407,566
countyname100%407,566
cousubfp100%407,566
cousubname100%407,566
tractce100%407,566
tractname100%407,566
taxacctnum<0.1%12
taxyear<0.1%28
taxdistrict<0.1%11
usecode<0.1%8
usedesc<0.1%0
zoningcode<0.1%6
zoningdesc<0.1%0
numbldgs100%407,549
numunits0.2%718
yearbuilt<0.1%21
numfloors0.2%708
bldgsqft<0.1%10
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue<0.1%2
landvalue<0.1%32
agvalue<0.1%2
totalvalue<0.1%32
taxacres<0.1%19
calcarea100%407,566
saleamt<0.1%0
saledate<0.1%0
ownertype<0.1%32
ownername<0.1%32
owneraddr<0.1%11
ownercity<0.1%11
ownerstate<0.1%11
ownerzip<0.1%11
parceladdr99.9%407,356
parcelcity99.9%407,354
parcelstate100%407,566
parcelzip100%407,421
legaldesc<0.1%0
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book<0.1%2
page<0.1%2
block64.1%261,330
lot<0.1%8
parceltype0.4%1,602
accesstype0.4%1,602
iucnclass0.1%339
placename4.3%17,543
placetype4.2%17,253
firmid100%407,566
firmdate100%407,566
fldzone100%407,566
zonesubty89.6%365,195
staticbfe10.3%41,835
elevmin100%407,452
elevmax100%407,452
elevavg100%407,452
fireplaces<0.1%0
heating<0.1%0
heatfuel<0.1%0
cooling<0.1%0
foundation<0.1%0
roofcover<0.1%0
siding<0.1%0
bldgtype<0.1%0
naicscode4.3%17,553
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%407,549
centroidx100%407,566
centroidy100%407,566
surfpointx100%407,566
surfpointy100%407,566
geom100%407,566
extras100%407,566
lrversion100%407,566

Schema mapping

How source columns from the acquired Nassau County GIS layers map into the harmonized entity schemas and assemble into the published parcel table, alongside supplemented fields (elevation, flood zone) and deterministic columns.

Schema mapping — Nassau County, New York (36059) 1 entity · most recent acquisition per entity · generated 2026-07-13 direct column transformed (expression) geometry extras json supplemented determined ALL ENTITIES → FINAL PARCEL SCHEMA Harmonized entity columns assemble into publish.parcel_layer — matched by column name. Supplemented fields show their fill rate in this county. SOURCE COLUMNS HARMONIZED ENTITIES PUBLISH.PARCEL_LAYER PARCEL swis_sbl_id swis_print_key_id muni_parcel_id roll_yr used_as_code used_as_desc yr_blt sqft_living nbr_bedrooms nbr_full_baths land_av total_av acres primary_owner mail_addr mail_city mail_state mail_zip parcel_addr citytown_name loc_zip book page geom school_name heat_type_desc fuel_type_desc 45 cols ⇢ parcelid parcelid2 taxacctnum taxyear usecode usedesc yearbuilt bldgsqft bedrooms fullbaths landvalue totalvalue taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelzip book page geom taxdistrict heating heatfuel extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% updated 100% lrversion geom · derived from geometry geom dem.us_1m · USGS 1m DEM 100% elevmin 100% elevmax 100% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 89.6% zonesubty 10.3% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 100% numbldgs 100% parcelstate 64.1% block lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode usedesc numbldgs yearbuilt bldgsqft bedrooms fullbaths landvalue totalvalue taxacres calcarea ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip book page block firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg heating heatfuel updated centroidx centroidy surfpointx surfpointy geom extras lrversion publish.parcel_layer columns not fed by these sources (35) — empty or below 50% fill in this county parentid, stackid, zoningcode, zoningdesc, numunits, numfloors, halfbaths, imprvalue, agvalue, saleamt, saledate, legaldesc, township, section qtrsection, range, plssdesc, lot, parceltype, accesstype, iucnclass, placename, placetype, fireplaces, cooling, foundation, roofcover, siding bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit PARCEL 27 mapped · 45 kept in extras · 27 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL swis_sbl_id swis_print_key_id muni_parcel_id roll_yr used_as_code used_as_desc yr_blt sqft_living nbr_bedrooms nbr_full_baths land_av total_av acres primary_owner mail_addr mail_city mail_state mail_zip parcel_addr citytown_name loc_zip book page geom school_name heat_type_desc fuel_type_desc parcelid parcelid2 taxacctnum taxyear usecode usedesc yearbuilt bldgsqft bedrooms fullbaths landvalue totalvalue taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelzip book page geom taxdistrict heating heatfuel extras · 45 source columns preserved as json county_name, muni_name, swis, print_key, sbl, citytown_swis loc_st_nbr, loc_street, loc_unit, prop_class, roll_section full_market_val, front, depth, sq_ft, school_code, sewer_type sewer_desc, water_supply, water_desc, utilities utilities_desc, bldg_style, bldg_style_desc, heat_type fuel_type, nbr_kitchens, ag_dist_code, ag_dist_name, po_box add_owner, add_mail_addr, add_mail_po_box, add_mail_city add_mail_state, add_mail_zip, grid_east, grid_north spatial_yr, owner_type, nys_name, nys_name_source, dup_geo calc_acres, gfa extras not present in source — filled with NULL (27) zoningcode, zoningdesc, numbldgs, numunits, numfloors, halfbaths, imprvalue, agvalue, saleamt, saledate, parcelstate, legaldesc, township section, qtrsection, range, plssdesc, block, lot, updated, sourceurl, parentid, fireplaces, cooling, foundation, roofcover, siding

Neighboring counties

Parcel data for counties bordering Nassau County:

On this page

Attribute coverageSchema mappingNeighboring countiesRelated